Electric weighing apparatus.



F. FEINSTBINL J. W. EWART. 4

ELECTRIC WEIGHING APPARATUS.

APPLICATION FILED AUG. 15. 1910.

Patented June 13, 1911 3 SHEETS-SHEET 2.

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F. PEINSTEIN a J. W. EWART.

ELECTRIC WEIGHING APPARATUS. .f APPLICATION FILED AUG.15. 1h10.

Patentd June 13, 1911.

3 SHEETS-SHEET 3.

es f ELECTRIC WEGHING APPARATUS.

Specication of Letters Patent.

Patented J une 13, 1911.

Application inea August is, 1910. serial Nn. 577,245.

To all whom it may 001mm:

Be it known that we, FELIX FEINSTEIN and J on1 WILLIAM EwAn'r, subjectsof the King 4of GreatiBritain, residing, respectively; at

.of an electric current produced in concordance with, or bearing somerelation to, the weights weighed.

According to the present invention we provide an insulating frame tocarry a number of lengths of conducting wire, each length of wire havingits two' ends secured to one bar of the frame while it passes around astud on another bar, so that the frame carries a number of parallellengths of conducting wires in pairs extending in a verticalfdirection.There is also provided an vouter wire upon one side and an outer wireupon the other side 0f the parallel series of wires, the ends of saidouter wires bein secured to the frame, and those ends o the two outerwires, adjacent to the studs aforesaid, are fitted with terminals whichcan be connected to a source of electricity in which 'there is alsoplaced an ammeter with its dial` suitably graduated.

Carriedifrom some part of the weighing machine, which part moves orchanges its osition in accordance with the weights belng weighed, weprovide two bars suspended so as to extend transversely of the saidwires carried bythe frame, one bar upon one side and the other upon thevother side wires. The racing surfaces of these two bars 'carryoppositely arranged conducting plates of metal, and th bars are movabletoward and awiay from each other, so that when moved `etowar: each otherthey clamp the wires vfhetwe plates and 't ereby comp ete an electriccircuit through the wires, the. 4length of the circuit through the wiresvarying according tot-lie position of the clamping bars.

of the said.

their o posed. conducting- The clamping bars are mounted in a suitablecase or frame, which carries also electromagnets by which the bars canbe drawn together, springs being provided todistance them apart, and theelectro-magnets carried by the clamping bar frame can also be connectedto a source ofelectricity, and a switch --preferably a double oleswitchis provided by which both the electro-magnets aforesaid and theparallel wires can be placed in circuit or disconnected. By such anapparatus the actual weighing operation is carried out before thecurrent is switched on and when the clamping bars are not in contactwith the wires, and thereby the bars do not produce friction thereon,and when the oscillations or vibrations of the weighing machine haveceased, the circuit is comple-,ted by the switch aforesaid, the clampingars clamp the wires, and the weight is accurately ascertained andindicated.

The invention will be readily understood by further 4describing the samewith reference to the accompanying drawings, whereon- Figure 1 is anelevation to show the parallel wires carried by the frame, and the caseor frame carrying the clamping bars; Fig. 2 being a rear elevation ofthe lower part of the clamping frame showing a means Ior securing theends of the wires thereto. Fig. 3 is a sectional plan showing thecasecarrying the clamping bars. Fig. 4 is a sectional elevation of aweighing ap aratus fitted with the-improvedelectrical indicating device,and Fig. 5 is a diagram indicating some passes around one of the studs3, and beyond this, single outer wires 5, 6 are provided, the upper endsbeing secured respectively to terminals 7, 8, whilethe lower ends" ofthe wires 5, 6 are secured to the bar 2.

Means are preferably provided for distancing the bars 1 2in order tomaintain the wires carried ereby at a suitable tension, and inthedrawings as for instance at Fig. 4, the bar 1 is fixed to a. part oftheframe 9 of a weighing apparatus of any suitable construction, while thebar 2 is held b vscrews also passing through the frame 9,

whereby the bar can be aojusted toward the said frame 9 and thereby thewires tensioned.

The frame'or box 10 (Fig. 4) is provided with an eye-bolt 11 by which itmaybe suspended, and is fitted with any suitable multiplying system oflevers as is well known in.

weighlng machines, said levers beingpivotally connected together andfulcrumed or held apart by springs 17.

The wires 4, 5, 6 of the frame (Fig. 1) pass between the plates carriedby these bars 14, 15, and the case 13 is moved in the longitudinaldirection of the wires by the movement of the weighing mechanism. Inorder to cause therbars 14, 15 to clamp the wires 4, 5, 6,electro-magnets 18 are provided carried by the case 13 (Fig. 3),and thearmatures 19 of these magnets are respectively connected one'to the bar15 and the other to the bar 1'4 b suitable connectin rods as indicatedat -F1g. 3, and the coils o the electromagnets 18 are connectedin'series to the two terminals19" and 20. With this apparatus, theelectrical connections with some source of electricity, should'be suchthat upon the article having been weighed and the weigh- 'ing levershaving ceased vibrator motion',

the electro-magnets 18 are excite causing -the bars 14, 15 to clamp thewires 4, 5, G,

and the terminals 7, 8 are also placed in circuit so that the currentpasses through the 'wires in a circuitous course lfrom .the termi- .nal7 to the terminal 8, this circuit containing an ammeter suitablyindexed, whereby the weight is indicated.

At Fi 5 is shown`by diagram, an example o the electrical connectionssuch as we propose to em loy, and from this it will be observed that romone of the four cells` 21', connected in series, ai' conductor 22proceeds-to the terminal 2Q of the case 13 to .pass through the magnetcoils 18, and` from theop losite terminal ='19" 'a conductor 23 rocee sto one'termingfl of any well known orm of double pole 'witch 24, andwhen that switch is'placed' connection, current proceeds by theconductor 25fto the opposite pole of the battery, and sb arrange thecurrent from-.thewhole of the four cells (which number is shown by wayof example) passes through the circuit' just `l-enumerated. From one oftheV cells the conductor 26 passes to one of the terminals of the switch24, While from the opposite terminal a conductor 27 proceeds to oneterminal of an ammeter 28, from the opposite terminal of which aconductor 29 extends to o ne terminal 8 of the wire-carrying frame, and

when the current is switched on, the current passes through all thelengths of wire above the clamping bars 14, 15 (the latter being closedtogether) and so passes by way of the contacting plates 16 (Fig. 3).From the opposite terminal 7 the current passes by a conductor 30 to oneof the other cells of the batter'ly, but so arranged, as will beobserved,

that e current passingthrough the-Wires of the frame 1, 2 is only thatfrom two of the cells. With this arrangement, the article havingbeenweighed and the Weighing machine having become stationary, it is onlynecessary to turn the handle of the double pole switch 24 and the weightweighed will be indicated upon the dial ofthe ammeter 28.

What we claim as our invention and de sire to secure by patentis 1. Inapparatus for electrically indicating weights weighed; the combinationwith a weighing machine an insulated stationary frame located adjacentto said machine, a plurality of separate lengths of conducting wireconnected at both ends to one member of said frame, studs on theopposite parallel member of said vframe around Which studs said wiresare passed to form aV plurality of U-shaped strands, a single wire uponeach side of said series of parallel strandsforming a series ofparallclconduct- ,ing wires, both of said single wires being attached attheir ends to said frame members, and a terminal connected to that endof each of said single wires adjacent to said studs and capable ofconnection to a source of electricity; of two clamping bars ofinsulating material, a case to carry said -two clamping bars, means forsuspending said case from a moving part of the .weighing machine, saidtwo clampin bars` being located on op osit'e sides o said series ofparallel condlucting wires carried by said stationary frame, metalplates carried on the inner faces of said clamping bars, means for tionof said clampin bars on t e said parallel wires, and to in icate the weiht so ascertained, substantially as set fo 2. In apparatus forelectrically indicating weights weighed; the combination with a weighingmachine, an insulated stationary frame located adjacent to said machine,a plurality of separate lengths of conducting Wire connected at bothends to one member of said frame, studs on the opposite parallelmcmberof said frame around which studs said wires are passed to form aplurality of U-shaped strands, a single wire upon each side of saidseries of parallel strands forming a series of parallel conductingwires, both of said single wires being attached at their ends to saidframe members, and a terminal connected to that end of each of saidsingle wires adjacent to said studs and capable of connection to asource of electricity; of two clamping bars of insulating material, acase to carry Said two clamping bars, arms connected to said case,knife-edge bearings on a moving part of the weighing machine to engageends of said arms to support the said case carried thereby, said twoclamping bars being located on opposite sides of the series of parallelconducting wires carried by said stationary frame, metal plates carriedon the inner faces of said clamping bars, means for bringing saidclamping bars together when the weighing operation has been effected bysaid machine to cause said metal plates to electrically connect pairs ofsaid series of parallel wires, and an ammeter located in the electricalcircuit between one of said terminals and said source of electricity, tomeasure the electrical resistance in said series of. parallel wirescorresponding to the position `-of said clamping bars on the saidparallel wires, and to indicate the weight so'ascertained, substantiallyas set forth.-

3. In apparatus for electrically indicating.

Weights weighed; the combination with a weighing machine, an insulatedstationary frame located adjacent to said machine, Va plurality ofseparate lengths of conducting Wire connected at both ends to one memberof said frame, studs on the opposite parallel member of said framearound which studs c connection to a source of electricityof two.

\ said wires are passed to form a plurality of U-shaped strands, asingle Wire upon each,

side of said series of parallel strands -formf ing a series of parallelconducting wires both of said sin le wires being attachedit their endsto sai frame members, and a terminal connected to that end of each ofsaid single Wires adjacent to said studs and capable of clamping bars ofinsulating mater-lai, a case to carry said two clamping bars, means forsuspending said case from a moving part of the weighing machine, saidtwo clamping bars being located on opposite sides of said series ofconducting parallel wires carried by said stationary frame, metal platescar: ried4 on the inner faces of said clamping bars, electro-magnetscarried by said case and adapted to draw the two clamping bars togetherto cause said metal plates to electrically connect pairs of said seriesof parallel wires, electric conductors for connecting saidelectro-magnets to a source of electricity to energize saidelectro-magnets when the weighing operation has been effected by saidmachine, and an ammeter located in said electrical circuit between oneof said terminals and said source of electricity, to measure theelectrical resistance in said series of parallel wires corresponding tothe position of said clamping bars on the said parallel wires, and toindicate thefweight so ascertained, substantially as set forth.

4. In apparatus for electrically indicating weights weighed; thecombination with a Weighing machine, an insulated stationary framelocated adjacent to said machine, a plurality of separate lengths ofconducting Wire connected at both ends to one member of said frame,studs on the op osite parallel member of said frame aroun which studssaid Wires are passed to form a 'plurality of U-shaped strands, -asingle wire upon each side of said series of arallel strands form ing aseries of parallel conducting wires, botvh of said single wires beingattached at their ends to said frame members, and a terminal connectedto that end of each of said single wires adjacent to said studs andcapable of connection to a source of electricity; of two clamping barsof insulating material, a case to carry said two clamping bars, meansfor suspending said case from a moving part of the weighing machine,said two clamping bars being located on o posite sides of said series ofparallelicon ucting wires carried by said stationary frame, metal platescarried on the inner faces of said clamping bars, electro-magnetscarried by4 said case and adapted to draw the two clamping bars togetherto cause said metal plates to electrically connect pairs of said seriesof parallel wires, electric conductors for connecting saidelectro-magnets 4to a source of electricity, a switch adapted to closethe circuit through said conductors and electro-magnets to energize saidelectromagnets when the weighing operation has been effected by saidmachine, and an ammeter located in the electrical circuit between one ofsaid terminals and said source of 1S bars, means for suspending saidcase from a a terminal connected to that. end of each of said singlewires adjacent. to said studs and capable of connection to a source ofelectricity; of two clamping bars of insulating material, a case tocarry said two clamping moving part of the weighing machine, said twoclamping bars being located on o positesides of said series of parallelcon ucting' wires carried by said stationary frame, metal lates carriedon the inner faces of said c amping bars, means for normally 'holdingthe clamping bars apart, electroymagnets carried by said case, armaturescarried by said clamping bars and adapted to be attracted by saidelectro-magnets to draw the two clamping bars together andv cause saidmetal plates to connect pairs of said series of parallel wires, electricconductors for connecting said electro-magnets to a source ofelectricity to energize said electro-magnets when the weighing opera-vtion has beeneiected by said machine, and an ammeter located in theelectrical circuit i between one of said terminals and said source ofelectricity,to measure the electrical resistance in `v,said series of'parallel Wires corresponding to the position of said clamping bars onthe said parallel wires, and to indicate the. weight so ascertained,substantially asset fort Y.

6. A mach-ine for electrically indicating Weights weighed comprisin incombination; a casing, a system of weig ing levers within vsaid casing,means connected at one end of the system of levers for carrying thearticle to be weighed, an insulated Stationary frame within said casing,Ia plurality of separate lengths of conducting wire connected at bothends to one member of said frame,

studs on the opposite parallel member ofv said frame around which studssaid wires' are passed to form a plurality of U-shaped strands, a singlewire upon each` side of said series of parallel strands forming a seriesof parallel conducting wires both of said single wires being attached attheir ends to said frame members, a terminal connected lto that end ofeach of said single wires adjacent to said studs and capable ofconnection to a source of electricity, two clamping bars of insulatingmaterial, a case to carry said two clam ing bars, arms connected to'said case, kni e-edge bearings on the free end of the lever at the otherendof thc-system of weighing levers, means on the ends of the said armsto engage said bearings to 'support said case, said two clamping barsbeing located on opposite sides of said series of parallel conductingwires carried by said stationary frame, metal plates carried on theinner faces of said clamping bars,

-means for holding the clamping bars apart,

electro-magnets carried by said case, armatures carried by said clampingbars and adapted to be attracted by saidelectro-magnets to draw the twoclamping bars together and lcause said mctalqilates to connect pairs ofsaid series of parallel wires, electric conductors for connecting saidelectro-magnets to a source of electricity, a switch adapted to closethe circuit through said .conductors and electro-magnets to energizesaid electromagnets when 'the weighing operation vhas been effected bysaid machine, and anammeter located in. the electric circuit between the..terminals of said insulated frame and including the source ofelectricity, to measure the electric resistance in the said series ofparallel wires corresponding to the position of the clam ing bars onsaid parallel wires, and to indicate the weight so indicated,substantially as set forth.

In witness whereof we have hereunto Set our hands inthe presence of twowitnesses.

FELIX FEINSTEI'N. y I JOHN WILLIAM EWART.

" Witnesses:

THOMAS WILLIAM ROGERS, WILLI'AM A. MARSHALL.

